package com.zhentao.filter;

import com.alibaba.cloud.commons.lang.StringUtils;
import com.zhentao.utils.JwtService;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.Map;

/**
 * @ClassName: GatewayFilters
 * @Author: muhaoyang1
 * @Date: 2024/12/17 15:24
 * @Comment:
 */
@Component
public class GatewayFilters implements GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1.获取request和response对象
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();

        System.out.println(request.getURI().getPath() + "过滤器-");
        //2.判断是否是登录
        if (request.getURI().getPath().contains("/login") || request.getURI().getPath().contains("/alipay")) {
            //放行
            return chain.filter(exchange);
        }
        if (request.getURI().getPath().contains("/registry")) {
            //放行
            return chain.filter(exchange);
        }
        if (request.getURI().getPath().contains("/message/send/code")) {
            //放行
            return chain.filter(exchange);
        }
        if (request.getURI().getPath().contains("/code")) {
            //放行
            return chain.filter(exchange);
        }


        //3.获取token
        String token = request.getHeaders().getFirst("Authorization");

        System.out.println("token" + token);
        //4.判断token是否存在
        if (StringUtils.isBlank(token)) {
            System.out.println("没有token");
            response.setStatusCode(HttpStatus.UNAUTHORIZED);

            return response.setComplete();
        }

        //5.判断token是否有效
        try {
            int i = JwtService.verifyToken(token);
            if (i != 1) {
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }

            Map<String, Object> map = JwtService.getClaimsMap(token);
            Object userId = map.get("userId");
            //2.在header里面添加新的信息-userId
            ServerHttpRequest serverHttpRequest = request.mutate().headers(httpHeaders -> {
                httpHeaders.add("userId", userId + "");
            }).build();
            //3.重置header
            exchange.mutate().request(serverHttpRequest).build();

        } catch (Exception e) {
            e.printStackTrace();
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        //6.放行
        return chain.filter(exchange);

    }
}
//package com.zhentao.filter;
//
//import com.zhentao.utils.JwtService;
//import org.apache.commons.lang.StringUtils;
//import org.springframework.cloud.gateway.filter.GatewayFilterChain;
//import org.springframework.cloud.gateway.filter.GlobalFilter;
//import org.springframework.http.HttpStatus;
//import org.springframework.http.server.reactive.ServerHttpRequest;
//import org.springframework.http.server.reactive.ServerHttpResponse;
//import org.springframework.stereotype.Component;
//import org.springframework.web.server.ServerWebExchange;
//import reactor.core.publisher.Mono;
//
//import java.util.Map;
//
///**
// * @ClassName: GatewayFilters
// * @Author: muhaoyang1
// * @Date: 2024/12/17 15:24
// * @Comment:
// */
//@Component
//public class GatewayFilters implements GlobalFilter {
//    @Override
//    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//        //1.获取request和response对象
//        ServerHttpRequest request = exchange.getRequest();
//        ServerHttpResponse response = exchange.getResponse();
//
//        System.out.println(request.getURI().getPath() + "过滤器-");
//        //2.判断是否是登录
//        if (request.getURI().getPath().contains("/login")) {
//            //放行
//            return chain.filter(exchange);
//        }
//
//
//        //3.获取token
//        String token = request.getHeaders().getFirst("Authorization");
//
//        System.out.println("token" + token);
//        //4.判断token是否存在
//        if (StringUtils.isBlank(token)) {
//            System.out.println("没有token");
//            response.setStatusCode(HttpStatus.UNAUTHORIZED);
//
//            return response.setComplete();
//        }
//
//        //5.判断token是否有效
//        try {
//            int i = JwtService.verifyToken(token);
//            if (i != 1) {
//                response.setStatusCode(HttpStatus.UNAUTHORIZED);
//                return response.setComplete();
//            }
//
//            Map<String, Object> map = JwtService.getClaimsMap(token);
//            Object userId = map.get("userId");
//            //2.在header里面添加新的信息-userId
//            ServerHttpRequest serverHttpRequest = request.mutate().headers(httpHeaders -> {
//                httpHeaders.add("userId", userId + "");
//            }).build();
//            //3.重置header
//            exchange.mutate().request(serverHttpRequest).build();
//
//        } catch (Exception e) {
//            e.printStackTrace();
//            response.setStatusCode(HttpStatus.UNAUTHORIZED);
//            return response.setComplete();
//        }
//
//        //6.放行
//        return chain.filter(exchange);
//
//    }
//}
